Human health

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Across
  1. 1. The smallest blood vessel.
  2. 3. Another word for widepipe.
  3. 5. Two main branches of the widepipe.
  4. 6. The red liquid that flows through the body.
  5. 8. Ability of the body to resist disease.
  6. 10. A serious disease caused by cells.
  7. 11. Muscular organ that pumps blood throughout the body.
  8. 12. A blood vessel that carries blood back to the heart.
  9. 13. To breathe out.
Down
  1. 2. Substance that causes disease,
  2. 4. A blood vessel that carries blood away from the heart.
  3. 7. Cancer,cold
  4. 9. To breathe in.
  5. 14. One of the two organs that people use to breathe air.